Commit Graph

584 Commits

Author SHA1 Message Date
Tomas Winkler c216fdeb2e mei: wd: decouple and revamp watchdog state machine
Before ME watchdog was exported through standard watchdog interface
it was closed and started together with the mei device.

The major issue is that closing ME watchdog disabled also MEI device,
to fix this the watchdog state machine has to be independent from MEI
state machine.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-08-16 09:51:02 -07:00
Tomas Winkler 248ffdf7c9 mei: wd: rename watchdog constants to be more descriptive
1. rename defines to more be descriptive
2. remove duplicated defines from interface.h
3. add common prefix MEI_

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-08-16 09:51:02 -07:00
Tomas Winkler c8df72920c mei: wd: add option WDIOF_SETTIMEOUT
According watchdog-kernel-api.txt WDIOF_SETTIMEOUT
should be set if the driver supplies set_timeout function

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-08-16 09:51:02 -07:00
Tomas Winkler 9bb3a5897e mei: fix device stall after wd is stopped
After watchdog was disabled the driver would stall
due to wrong calculation of credits reduction

The cat&paste bug was introduced in the commit
7bdf72d3d8
mei: introduce mei_data2slots wrapper

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-08-16 09:50:17 -07:00
Tomas Winkler b210d7506f mei: name space for mei device state
1. add MEI_DEV_ prefix for mei device state enums
2. rename mei_state to dev_state
3. add constant to string translation for debug purposes

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-08-16 09:43:58 -07:00
Tomas Winkler 6ddf3aea42 mei: style : reformat PCI device IDs
1. reformat PCI ids list in hw.h for better readability
2. update some code and brand names

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-08-16 09:43:58 -07:00
Tomas Winkler 068c0ae966 mei: use KBUILD_MODNAME when allocating resources from the OS
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-08-16 09:43:58 -07:00
Tomas Winkler 9a123f1983 mei: add mei_quirk_probe function
The main purpose of this function is to exclude ME devices
without support for MEI/HECI interface from binding

Currently affected systems are C600/X79 based servers
that expose PCI device even though it doesn't supported ME Interface.
MEI driver accessing such nonfunctional device can corrupt
the system.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-08-16 09:40:28 -07:00
Tomas Winkler 07b509b794 mei: revamp me client search function
me client search functions returns index
into me_client array according me client id
or me client uuid.

1. Add common prefix for the functions mei_me_cl_<>
2. create new function mei_me_cl_by_id that wraps open
 coded loops scattered over the code
3. rename mei_find_me_client_index to  mei_me_cl_by_uuid
4. rename mei_find_me_client_update_filext  to
 mei_me_cl_update_filext and updates its parameter names

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-08-16 09:40:28 -07:00
Tomas Winkler 6078188e2b mei: use module_pci_driver
use module_pci_driver() macro to wrap standard
pci module registration into a single line

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-07-19 15:33:30 -07:00
Greg Kroah-Hartman 5b1f6d81e4 Merge 3.5-rc7 into char-misc-next.
This lets us pick up the mei driver changes that we need in order to
handle future merge issues.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-07-18 06:22:45 -07:00
Tomas Winkler 483136ea0e mei: mei_irq_thread_write_handler - line break fix
1. straight up lines that doesn't cross 80 characters
2. don't break strings

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-07-10 14:58:36 -07:00
Tomas Winkler b45f3ccf80 mei: streamline the _mei_irq_thread_close/ioctol functions
change statements of types

	if (ok)
		do something
	else
		return err

into

	if (err)
		return err

	do something

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-07-10 14:58:36 -07:00
Tomas Winkler 7bdf72d3d8 mei: introduce mei_data2slots wrapper
Introduce mei_data2slots wrapper for sake of
readability. This wrapper close up the open code
for computing slots from a message length:
rond up dwords count from payload and header byte size

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-07-10 14:58:35 -07:00
Tomas Winkler 7cb1ba9b67 mei: mei_wd_host_init: update the comment
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-07-10 14:58:35 -07:00
Tomas Winkler d242a0afb2 mei: remove write only wariable wd_due_counter
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-07-10 14:58:35 -07:00
Tomas Winkler 4a0d6a7463 mei: mei_device can be const for mei register access functions
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-07-10 14:58:35 -07:00
Tomas Winkler 16a50b1270 mei: pci_resume: set IRQF_ONESHOT for msi request_threaded_irq
when the default irq quick handler is used then IRQF_ONESHOT must be set
otherwise the request fails and following error is displayed:

mei 0000:00:16.0: irq 48 for MSI/MSI-X
genirq: Threaded irq requested with handler=NULL and !ONESHOT for irq 48
mei 0000:00:16.0: request_threaded_irq failed: irq = 48.
dpm_run_callback(): pci_pm_resume+0x0/0x140 returns -22
PM: Device 0000:00:16.0 failed to resume async: error -22

Reported-by: Peter Wu <lekensteyn@gmail.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Tested-by: Peter Wu <lekensteyn@gmail.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Cc: stable <stable@vger.kernel.org> # 3.5
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-07-10 10:45:07 -07:00
Tomas Winkler 726917f052 mei: revamp host buffer interface function
1. Use unified _hbuf_ prefix for host/write buffer functions.
2. Cleanup the code w/o functional changes.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-26 15:59:44 -07:00
Tomas Winkler 24aadc809f mei: don't query HCSR for host buffer depth
1. We record host (write) buffer depth during reset
 so we don't need to query HCSR register later on.
 The host buffer depth doesn't change after the reset
2. Use mei_hbuf_max_data function to compute payload size in bytes

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-26 15:59:44 -07:00
Tomas Winkler 21c66d1be7 mei: group wd_interface_reg with watchdog variables within struct mei_device
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-20 16:41:38 -07:00
Tomas Winkler 7d5e0e5954 mei: mei_irq_thread_write_handler check for overflow
check for overflow when retrieving empty write slots

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-20 16:41:38 -07:00
Tomas Winkler 169d1338ed mei: make mei_write_message more readable
1. reduce hairy casting
2. replace open code with mei_count_empty_write_slots
4. include header size in check for overflow
3. use concise for loop instead of a while loop

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-20 16:41:38 -07:00
Tomas Winkler d20411588d mei: check for error codes that mei_flow_ctrl_creds retuns
we cannot use if(!mei_flow_ctrl_creds()) logic as
mei_flow_ctrl_creds also negative error codes

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-20 16:41:38 -07:00
Tomas Winkler 49fbd3f1c3 misc: mei: set WDIOF_ALARMONLY on mei watchdog
mei watchdog doesn't reboot the system it only produces event
therefore mark it as WDIOF_ALARMONLY.

This patch depends on:
commit 2bbeed016d
Author: Alan Cox <alan@linux.intel.com>
watchdog: Add a flag to indicate the watchdog doesn't reboot things

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-13 15:34:31 -07:00
Samuel Ortiz 169dc38868 misc: mei: Disable MSI when IRQ registration fails
Since MSI is enabled right before that, we should disable it when
registration fails.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-13 15:34:31 -07:00
Tomas Winkler 1e69d64a28 misc: mei: fix stalled read
This bug caused severe connectivity issue in the LMS application
(LMS is described in  Documentation/misc-devices/mei/mei.txt)

The bug was introduced in patch:
commit 1ccb7b6249
staging/mei: propagate error codes up in the write flow

The patch has reverted the return value logic of some fo function but
the conditional in _mei_irq_thread_read function was not swapped
making read always entering the error path

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-13 13:52:14 -07:00
Tomas Winkler a44cab4aff misc: mei: unregister misc device in pci_remove function
Since the misc device is registered only in the pci probe function
it has to be also unregistered in the counterpart pci remove function
and not in the module exit function.
In case of probe failure the driver was oopsing in module exit function.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-13 13:52:14 -07:00
Tomas Winkler aa189ecdc0 misc: mei: set IRQF_ONESHOT for msi request_threaded_irq
when the default irq quick handler is used then IRQF_ONESHOT must be set
otherwise the request fails and following error is displayed:

genirq: Threaded irq requested with handler=NULL and !ONESHOT for irq ...

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-13 13:52:14 -07:00
Tomas Winkler 5a44988207 mei: move doc files Documentation/misc-devices/mei
1. move mei.txt, TODO, and the example code under Documentation/misc-devices/mei
2. update the TODO file

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-09 13:59:09 -07:00
Tomas Winkler 4f3afe1d8c mei: export mei.h for the user space
The header exports API for application layer

1. move under include/linux and add to  the export list
2. update include path n the sources
3. update TODO

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-09 13:58:06 -07:00
Tomas Winkler 32c826b66c mei: pci_probe/remove: use dev_err instead of printk(KERN_ERR
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-09 13:53:26 -07:00
Tomas Winkler 374212750b mei: use pr_err instead of printk(KERN_ERR
pr_ format is more compact and enable utilizing of pr_fmt macro

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-09 13:53:26 -07:00
Greg Kroah-Hartman ffc2825c29 Staging: mei: move the mei code out of staging
It's been cleaned up, and there's nothing else left to do, so move it
out of staging into drivers/misc/ where all can use it now.

Cc: Tomas Winkler <tomas.winkler@intel.com>
Cc: Oren Weil <oren.jer.weil@intel.com>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-01 18:23:38 -04:00